Implement frame



. July 21,1936. C. H. WHITE 2,048,584.

IMBLEMENT FRAME A Original Filed Sept. 19; 1927 2 Sheets-SheeJrl l July 2l, 1936. c. H. WHITE IMPLEMENT FRAME Original Filed Sept. 19, 192? 2 Sheets-Sheet 2 Patented July 21, 1936 UNITED STATES v PATENT Q 1'1":1211315;V

IlVIPLEMEN T FRAME Charles H. White, Moline, Ill., assignor to Deere & Company, Moline, Ill., acorporation of Illinois 11 Claims.

This is a division of my prior Patent, No. 1,943,778, issued January 16, 1934.

- `The present invention relates generally to frames for agricultural implements and the like, A particularly those of the motor-driven or tractorpropelled type.

One of the principal objects of the invention is to provide an implement which is in the nature of lanattachment, adapted for direct mounting in its entirety on a tractor, so that the wheels of the tractor serve as the load sustaining and steering members for the implement.

Another object of the invention, made possible by the foregoing construction, is to shorten the over-all length of the machine, so as to reduce the turning room required at the ends of the field. According to the present construction, the over-al1 length of the tractor and implement combined is only slightly longer than the overall length of the tractor itself.

Another object of the invention is to provide an imp-lement frame attachment of the above general description which can be attached to or detached from the tractor in a short length of time. It frequently happens that in order tov take advantage of weather and soil conditions, it is desirable to alternate the operations of plowing, harrowing and planting or other operations in the same eld or in different fields, and it is hence of great importance to be able to interchange implements in a short length of time. The present machine is so constructed that the implement can be attached to and detached from the tractor through the quick and easy connection and disconnection of only a .few parts; and one of the features by which the tractor and implement unit can be readily connected and4 disconnected is a particular construction and arrangement of the implement parts whereby the tractor wheels can be driven over one end of the implement frame in the attaching and detaching operations.

Numerous other objects of the invention pertaining to the more specific features of construction will be set forth in the following description of a preferred embodiment of the invention.

In the drawings illustrating such embodiment: Figure 1 is a plan View of a planting implement constructed in accordance with the prin-` ciples of the present invention, the'rear driving wheels of the tractor also being shown to illustrate the relativeV locations of the implement frame and planter units with respect to the tractor;

Figure 2 is a perspective View, showinghow the tractor can be runv over portions of the implement frame and associated parts in the operation of attaching the implement to or detaching itfrom the tractor; and

Figure 3 is a perspective View in section. illustrating onev of the ramps or bridge vmembers which are carried on the front of the implement frame.

-Figure 1 shows the general construction of the implement frame, and for best illustrating the present invention I vhave shown the implement frame as a part of `a planting implement adapted to be attached to the tractor and carrying a number of planting units. I shall first describe such structural features of the tractor as have cooperation with the planting implement, and shall then describe the detailed construction of the implement frame and units associated therewith. The tractor is of a type which is propelled by two rear drive wheels, the latter being designated l-l. The front end of the tractor is supported on two steering wheels, not shown, which are preferably, although not necessarily, disposed in the longitudinal planes of the tractor wheels I6.` 'I'he engine is at the forward portion of the tractor, as bestshown in Figure 2, and its power is transmitted to the drive wheels through a driving train. The engine crank shaft, the selective speed transmission mechanism and the differential are inclosed in an elongated housing I7 which constitutes the rear portion of the tractor frame. The details of the transmission mechanism and the differential form no part fof the present invention.

Extending laterally from each side of the housing Il' are suitable shafts which project outwardly through theside walls ofthe housing and 'extend through short lateral housings 24 which are bolted to the sides of the main Vhousing I'l.- Bolted to the outer ends Vof these lateralhous'ings are housings 25, which extend downwardly and slightly rearwardly. The latter housings 25 support therear driving wheels I6 and also enclose the driving chains or other means through which propelling power is transmitted to these rear wheels. Y

The upper rearward sides of the traction wheels i 6 have fenders 30 extending over the same, which fenders are suitably supported on bars 3l extending rearwardly from` the wheel-supporting housings 25. A platform 32 lextends between the fenders 30,l therear ends of the fendersV and of the platform being reinforced by a transverse angle bar 3?v which is secured to both. The forward portion of the platform 32 is cut away or left open, as at 32u in Figure V1, to accommodate the seed hopper on the intermediate planter unit. A standard 3d rises from the platform 32 and supports the operators seat.

`I shall now` describedthe construction of theV planting implement, Vincluding the manner in which itis mounted on the tractor, althoughit is to be understood that the present inventionis not to be limited to planting implements. Referring to vFigure 2, all of the parts'of the plant- 25. 'i' thebrackets 10 by bolts 1I or the like, the arms Y cated at 61.V Y

' considerably higher plane .than the sideV bars 66,

ing implementV are Vmounted on an open rectangular frame, the long dimension of whichextends transversely of the tractor. prises a transverse front bar 64, a transverse Vrear bar 65, and longitudinal side bars 66-66. All

of these bars :are preferablyV of angle sec'tionfandV the front ends of the side bars are secured to the cross bar Y64 by bending theft/Vertical flanges o1 thejside'bars inwardly and Vsecuring the same to theV vertical flange ofthe .cross-barV-64,V as ,indi- The rear bar 65'i's disposed'in a and in-joining such bars together the ends ofthe rear bar are curved downwardly and bolted to the Vertical yflanges of the side bars, as indicated Y The implement frame is'adapted to be `xedlyv ,3 secured at its front and rear ends tothe tractor.

Foromounting the frontV end of the frame on the tractor, two hanger ,brackets or arms 68 are secured tothe front bar 64 ofthe frame and are bent upwardly'andV forwardly (Figure 2) for resting 4,on or attachment to brackets `1l) which project-from each side of the Yengine bed orrtractor frame. `'Ihe hanger arms 69 may be secured to Y aording a readily attachable` and detachable connection whereby the front end of the implement frame can-be easily and'quickly connected f `to `or disconnected from the tractor. The dotted Vline, position in Figure Ziof the upper end of one fof the hanger arms indicates therrelation of these parts when therimplement isvattachedto the tractor.- VExtending diagonally between the front g endsof the-hanger arms 69 and the front cross- Y bar Y640i the frame arepbrace rods 1,2. The-front ends o fV such rodsY are adapted to be secured to the lugs or brackets 10 by boltsY or the like whenV Vthe implement frame is attached, preferably by the same bolts 1| which fastenvthe arms-69, and

, the implementY von iV the tractorthis iangeY is brought -to rest on therhorizontalange of YtheV bar 33, the two flangesbeing detachably con- Vnectedtogether'by bolts 14. Y

' *'It willfbe seen from ltheY Vforegoingqthat Vwhen the implement isY connected to thertractor, it is carried thereon Yin its entirety. It will also be Y noted that the front frame bar'64 is disposed in lfront ofthe tractor drive wheels and the rear 'frame bar 65 isv disposed in rearY of said drive wheels,Y sothat `the rectangular Youtline of the frame encompasses the drive-Wheels.V When itis desiredV to: disconnect, the implement frameV from the tractor, the bolts securing the arms or 'bracki f ets 69 tothe tractor frame and the bolts 14 are removed, the brace rods12` arerswung out tothe sidesrof the frame, and ythe front frame bar 64 i Y is dropped down into proximity to the ground,

this being the positionshown in Figure'2. 'I'l'iereg upon,the tractor wheels can befdrivenfout of the Vframe across the front frame ha;- 64. The complete detachment of the implement also requires ithe kdisconne'ction andremoval of certain` other Y :operating parts, whichY will be hereinafter described.

In a later part offthis description, YI shall also describe thev bridge members or ramps,

extendlacr'oss the front-iframe bar'64, and

Such frame com- Vunits, as all three Yare substantially duplicates.

over which the tractor wheelsY are driven in Vat'-V taching and detaching the implement.

The intermediate portion of the 4implement 'iframe is braced longitudinally by an intermediate Vwardly and is bolted to an angularly shaped bracket Y16'which is secured to the rear frame bar ss by a bom 11 (Figure 1) .Y The front ena of the intermediate frame bar 15 is secured to a bracket 18, which projects from the rear end of a housing 19, carried by the implement frame. YThe front end ofV said housing has an angular recess formed Y inits lower edge, which recess rests on the front' frame bar 64, this portion of the housing beingV bolted or otherwise secured Vto the frame bar 64. 15 The housing 18 encloses the power lift mechanism- Y andthe mechanism which derives power from the tractor motor andrdrives'the planter orother implement mechanism. Y Y V Y As Vstated above, the agriculturalv implement 2() chosen to illustrate the Vprinciples oftheA present invention is a planter-andas bestY shown in Figure 1, three planter units 83,` 84 :and 85(7are1 pivotally mounted for vertical swinging `move-` Y ment Vin the implement, frame between the front 25 and rear frame bars.' These planter units are so disposed in the implement frame thatrthe Yintermediate unit -84is positioned centrally between the traction wheels I6 of the tractor, and the two lateral units 83 and 85 are positioned outwardly on Veach side ofthe traction wheels. 'Y Y As has ,beenrheretofore described,rwhen the planting implement is attached-to thetractor the front frame bar 64 is disposed 'forwardly' of thedrive Y wheelsrlihunder theintermediate portionl of the tractor, and the rear frame bar ,65 is disposed in ,Y rearof the drive wheels; By virtue of this rela- Y tion ofthe implementirame with'respect totheV tractor, it will be apparent that the'threeplanter units 8384land'85 can'be-disposed in the 'transverse'plane of the Vwheels I6, and approximatel in the verticalaxial plane of the wheels.` Y

I donotrint'end to claim in this case'any of theV planter features andV combinations set forthand claimed in my copending application mentioned In describing theseV planter units, I shall Yonly referV to oneofV theY Each-#planter unit embraces in itsrentirety a furrow opener, a seed hopper`,'arseed,feeding`or selecting plateiseed dropping valve mechanism,V and a covering wheel. "All of these parts are car- Y ried by a shank 86,` which constitutes a main sup-1 porting member for theplanter unit; 'I'he furrow opener isV preferably in vthe `form of 'a runner 81,V` although a disc type of furrow Vopener might be employed. VThe rear end, of the runner is'se- Y cured to the shank 86, and the upwardly curved forward end thereof is braced'to the shank by a brace barV 88. The seedrhopper-89jis mounted on the upper end of the shank 86, and revolving in the bottom of this seed hopper is a. seed feed- Ving or' selecting"plate,fnot shown;r driven by 65. means which will be'referred to'lateni, J

VThe depth of the seed furrow opened by the runner 81 of Veachrplanter unit is controlled by ar'pair of Ywheels 94v which are' disposed in rear of the runner sliankjl'i.v Bothwheels are mount- 7o Y ed side by side on `ashaft carried'infa`yoke'96 `(Figure 1), the two side arms ofV which extend forwardly on opposite sides of the shank 86'and have pivotal mounting on a bolt 91 extending through the front edge of theshank (Figure-i2) 77,5#

e e v4eY above, but in order to furnish a clear description Y. Y' of the present invention I will briefly describe Y some of the Vplanter details.

A second bolt 98 passes` between the armsiof the'.

being. curved on an arc having the pivot bolt 9T- tivv as itsA center. It will be evident that by loosening the bolt S8, the wheels'94 may be swung l upwardly. or Adownwardly so as; to engage the ground. when the furrow opener has moved down to a, greater or lesser penetration. 'I'he 5 adjusted setting of the wheels 9d will, therefore, control the depth of the furrowopened by the runner 81.

Each planterv unit has pivotal connection with the implement frame through upper andy lower parallel linksl |04 andv |05. The rear ends of the links have pivotal connection with theV planter unit on vertically spaced pivots |00 and |01, and the front ends of the links have pivotal connection with the frame on vertically spaced pivots.

L |08 and |09. As shown, each link Vpreferably consists of two bars bolted together, with the front ends of the bars separated to form pivot yokes or forks. Such yokes establish widely spaced points of bearing support between the front end of each Z55-:link and the implement frame, whereby the planter unit is firmly supported against lateral tipping. 'Ihe above described mounting of yeach planter unit permits the unit to move upwardly and downwardly relative to the implement, frame, lthereby enabling the runner 81 to adapt itself to the contour of the ground, under the depth regulating control of the covering wheels 94. The two links and their pivots are so proportioned and arranged that in such up and down move` Szlfment the unit is heldV aty all times in the same angular relation to the vertical, in contra-distinction to afore and aft tilting of the planter unit, which would result in cross-checking inaccuracies.

Referring to Figure 2, it will be lnoted that the front ends of the parallel links have pivotalv connection with brackets ||2` from whichv extend arms ||3 which are bolted to the upper flange' of the front frame bar 60. Each bracket is also 45,. secured to the vertical flange of the frame bar. The pivot bolt orbolts |08 for the upper link |04` engage in the upper portion of` the bracket, and the pivot bolt or bolts |09 for the lower link engage in an arm depending from the lower portion 5u; ofy the bracket.

Extending transversely across the front end of the implement frame, andV rotatably supported in the three brackets ||2,` are upper and lower shafts |I1` and- ||8. The upper shaftk ||1 con- 55; stitutes a driving shaft through-which power istransmitted to the three planter units, and the lower shaft ||8 constitutes al drivingv shaft through which operating impulses are transmite tedio-the seed dropping valve mechanisms in the 60A, three units. f'

The. driving shaft ||1 is divided into three alined sections, ||1a, ||1b and ||1c disposed'co-N extensively across the frame. Theintermediate section. |i|1a extends transverselythrough the 65` housing 19,4havng operative connectiontherein with'mechanismfwhich drives the shaft 1 -under the control of the shaft ||8. The present invention is'not concerned withl the details :per se of this-'mechanism which is best shown invmy co-vmpendingapplication mentioned above, IThe twolateral shaft sectionsk ||1b and I|1c consist of-V square shafts adapted to have yreleasable coupling with the ends of the intermediate section ||1a` through.Y socket sleeves |2|. As best shown in 7;; Figure i ,2, lone of these socketsleevesis'.rigidly se-i` cured to the inner end of each lateral shaft section, and the extending end of each sleeve, is. adapted tobe slipped over the adjacent end of.` the intermediate shaft section ||1a, which latter shaft section is round. The sleeves. arereleas- ,5, ably coupled to thev intermediate shaft section by cotter pins` or the' like, which also function as shear pins to prevent breakage of thel operating parts in the event of jamming. of; the feed plate mechanism.

' The rotation of the'shaft |,|1 is: transmitted to the three planter units through individual shafts |23, which have bevel gear connection with'I the cross shaftY ||.1 and. whichlextends rearwardly'to the planter units; ing relation betweenthe` cross shaftv ||1 andthe rearwardly extending'` shaft |23 of theintermediate planter unit. The shaft section |11a: extends through the hubof a bevel gear |25, having keyed or pinned engagement therewith to drive the 20. gear. VThe hub has bearing support in a bearing boss |26extending upwardly from the bracket |12.V The bevel gear meshes with a bevel gear |21 which has a relatively long bearing hub jour*- naled in a boss |29 that alsoextends'upwardly 25 from thev bracket ||2. The rear end of. such. shaft has operative connection, with the vplanter unit fory driving the. seed selecting plate, and it. will hence be seen that such end ofthe shaft must be capable of vertical swinging movement-30 with the rise and fall of the: planter unit. Such swinging movement is accommodated by va uni versa] joint connection between the front end of the shaft |23 and its driving gear |21. The shaft is capableof a limited endwisemovement within the socket, to accommodate any slight shifting of the shaft Whichniay be incident to the verti cal movement of the planter unit. The rear end of the shaft. |23 has suitable support in a bearing carriedv by the runner shank 86. 4Q,Y

It will thus be seen that rotation of the shaft. |1a is operative to drive the seed' selecting plateof the planter unit irrespective of the. furrow opening depth adjustment ofthe unit, or of its rise and fall in passing over uneven ground. The V seed selecting plates of the two lateral planter units 83 and 85 are driven through alsubstantially identical arrangement of bevel gears mounted on the two laterally disposed brackets ||2. The

outer ends of the two shaft sections |1band |1c 50.

extend into square sockets formed inthe bearing, hubs of the two outer bevel gears |25 so that these lateral shaftsections can be slid outwardly through the gears to release their inner sleeve ends |2| from the ends-of the intermediate shaft 55 section ||1a. This is for the purpose of ,removing the two outer shaft sections. ||1bY and ||1c. fromthe path of' the tractor wheelsv I6 when. theV wheels areto be driven across--thefront `end of the frame, in vattachingand, detaching the plant 60.v ing implement as illustrated in Figure 2. YAftery the tractor wheels have been driven over thev frame bar 64, the shaft sections |-|1b and ||1c: are slid inwardly through their respective bevel gears and their sleeve ends |2| are recoupled to 65,;

the ends of the intermediate shaft section H104 by replacing the'cotter'pins.

To facilitate driving theY tractor wheels for-Y wardly or backwardly across the front frame bar 61|.l when attaching or detaching the implemenmm-,

bridge members or ramps |36 are secured tosuch frame bar at pointsV spaced correspondingly to the tread of the tractor wheels. One of such. bridgemembers or ramps is illustratedin sec.-

tion in Figure 3.v It wilLbe. noted that..it com- '75.;

Figure 1- illustrates the drive- 15 prisesan arched'plate |31havingfflan'ged 'endsv Y securedto a; flat plate |38. Theframe bar 64 ex.

tends transversely-.through the arch of each-of these ramps;being suitably secured to the underside Aof theV high portion of the arch.

YTheiiat plate |38 is'adapted-to rest-.upon the` ground andit will hence be seen that when drive` ing the:tractor wheelrs'overthe ramp,:the weight Y of the rear portionfofthe tractor isV transmitted 'through'the plates L31 and |38 directly tothe groundV and that no portion of such Weight is borne by the bari 64 'or any otherl portion ofthe.

' implement frame. YChannel barsxl39' extendV transversely of thefarched plate |31 to reinforce the sam-e and to provide traction surfaces, enabling the'tractor'wheels to travel up the. inclined Y ends of theiramp. `While the .drawingsfdo not "show the drivewheels equipped with the usualY Y ramps'is guided laterally by rflanges |4| which Vtraction lugs or grousers,V it will be understood Athat under most conditions these lugs will be used. Such lugs Vor grousers will vnot injurethe ramps |36.` The travel of the wheels over' vthe are turned upwardlyfrom the ends of the archedV plates |31.Y removed andthe center seedhopper 89 takenioff, the vonly preparatory steps necessary to be performed before theftractor .wheels can;be.driven over the ramps arethe outward shiftingof the- -shaft'sections |1b andal |1c, as above described,l VYand the shifting'of the Aupper vends of the diagonal Y brace rods V12 out of the Vpath of the tractor wheels. Y i Itjwill be noted that the'lo'wer'shaft f||8 `extends' through thejramps, alongside the frame bar'V 64,'and hence' itis notnecessary to uncouple or.

disconnect this shaftpreparatoryto driving'the tractorvvheels across the ramps.v lAs vbeforeremarked; such shaft has bearingfsup'portY in bear.

ing bosses vcarried by the brackets |2, and Vmount-n ed on the ends of VsuchV shaft'beyond theouter- Vmost brackets ||2 are arms |44 whichfhave pivotal connection at |.45iwithfrearwardly.extending links |46. Therear ends of such links havevpiv'- otalY connection with check Vforks-|41 of:clieck` heads |48,.there being-one of these' vcheck'heads mounted on each sidebar 66 substantially-in the transverse plane of the 'three planter units. Any form `of check headmay be used,V so fiar` asY the present inventionisV concerned,V 'but I preferlfto employa check head similar to thatshown in my Vprior Patent No. 1,805,506,`is`sued May 119,- 1931,

p and comprising a tripping or releasing arm 149,v which is adapted to be engagedv by -a large-darling button onthe check wirefor the purpose of openl ing the checkjhreadsolas to doif the wire at` predetermined points adjacent tothe ends ofthe rows; Operationof the'check headsVV |48 rocks the-shaft' H8, and'this' motion -is transmittedV thrughlinks* 54` (Figure'Z) to the seed dropping kvalve'mechar'iism of the several planting unitsrin alinanner similar to thatset forth'inV my `prior Patent No. 1,891,488g'issue'd December 20,1932.

' The mechanism which causes the intermittent rotation of'the`feedgsh`aftvf||1.is old and well known,Y and furthermoreY forms perse nopart'of the .Y present invention. Hence VI shall onlyde- `scribe the-'same inV briefjsuicient togive an understandingL of the operating cycle'ofV the-vmafchine.` VThe housing 19 includes mechanisml driven by'sprocket and chain means 58 from the tractor motor andV controlled Vby the rocking off the shaft A|'|8.for'intermittently rotating the seed; feedinglshaft'l ||f2 andthere is also included mech-v anism operating* through -a power lift arm 22| After `the bolts 1| and` 14 have been Y a-,oiassfrr a y y Y and aunk zzsjforrr'a'isingand mwenng autr` the implement units,.- reference being, hadto `the aforesaid copendingapplicatio'n for particular de.`

` tails.` f Brie'y, however; the Vlink 223 is connected nV with an armon a rock shaft;226 which extends transverselyof vthe. implement framerand issupeL ported in suitablejbearing brackets carried byjthe Y YrearV transverse frame bar 65k.Y ^Therock"shaft.Y l Y preferably carries lift arms 23| the outer .end

of each of which isV connected with theassociateddi Y planter unit to raise and lower the same. If der sired, marker arms 245'at the rear corners ofthe; implement frame may also .be raised Vand lowered by the rock shaft.) Further, the implementframe may carry achecl; Wire reel 389,'as by aireel frame 305, and power` driven means including a drivershaft. 292may be provided forwindingthe.

check'wire on the reel, all as best shown'inmy Vaforesaid copending s application.V n

The seed planting operations will begenerally 20.41 understood by those skilled in the artfandhence I 4vshall only' briefly summarize these operations.J The engagement of each button on the checkwire;

Vwith oneof the check'forks |41.willtr.ock suchV fork, whichwill ktransmit rocking motion to the checkshaftV I8 through therlinkl |46. 'This-shaft; will, in turn, transmit Vmotion through'thethree 1inksv|54V to actuatexthe K seed dropping f valvey f Y mechanisms of all three planter units, whereby the seed isdropped simultaneously into-all three seed furrows.y Such rockingxmovement of theY shaft |8 also controls the operating mechanism: Y within the housingV 19 vcontrolling therseed feedingshaft 1n. e

VVWhen it is desired to disconnect the implement from'the'tractor, the front and rearvends 'of the implement framer are released from the tractor Y by removing the bolts 1| and' 14; thenzth'elateral agonalfbraces 12,are-removed fromtheY pathofY 40 the tractorr wheels, all as previously described.v Thehopper 89 of the Vintermediate planterunit is also detached to permitithe Yrear bar 33'ofthe tractor tofclear such planter unityand the driveA chain means 58 is disconnected from'the tractor. Thereupon, theV tractor drivewheels VIii-can be.` driven outof [the implement frame Vacross the Vramps |36. the latter protecting the operating Yshaftrllll. 'I'he reattachment of the implementA Yto the tractor is merely a reversal `ofthe'above-t 1; The 'combinationwith' a tractor having' fronti l and rear wheels,V of Van implementadapted'to be Y attachedzto and detachedffromsaidtractor; com- (35::

A prising frame means having a transverse'frame bar adapted'to be disposed between said frontgandrear wheels'when the implement is attached to the 1 tractor; an operating unitsupported by said fra-m: r

means,V and means providing for the passageiof'm the wheels at one end of said tractor acrossv saidl transverse Aframe bar Vin theV attaching 'or detach-1A Ving of `the implement.v l

V2.Y The combination with a tractor having front and rear Wheels, of'an implement Vadaptedft'obew attached to and detached from said tractor, comprising a frame having an end bar arranged to extend transversely of the tractor between said front and rear wheels when the implement is attached to the tractor, a plurality of operating units disposed in planes spaced laterally of the wheels at one end of the tractor and including parts disposed alongside said wheels, and means whereby the wheels at said one end of said tractor can be driven across one end of said frame to clear said parts and bring the tractor and frame into proper relation for attaching the implement to the tractor.

3. The combination with a tractor, of an imp-lement adapted to be attached to and detached from said tractor, comprising a plurality of implement units, an operating member for said units mounted on the implement, and means carried by the implement and extending in protecting relation over said operating member to permit the wheels of the tractor to be driven over the same in attaching o-r detaching the implement.

4. The combination with a tractor having front and rear wheels, of an implement adapted to be attached to and detached from said tractor, comprising frame means having a frame bar arranged to extend transversely of the tractor between said front and rear wheels when the implement is attached to the tractor, a plurality of implement units supported by said frame means, and ramp means associated with said transverse frame bar and arranged whereby the wheels at one end of said tractor can be driven across said ramp means in the attaching or detaching of the implement.

5. The combination with a tractor having a pair of wheels at one end thereofy of an implement adapted to be attached to and detached from said tractor, comprising a frame arranged to encompass said tractor wheels when the implement is attached to the tractor, a plurality of implement units mounted on said frame and arranged whereby said tractor wheels can be driven over one end of said frame in the operation of attaching or detaching the implement, and ramp means carried by the latter end of said frame, over which said tractor wheels can be driven.

6. The combination with a tractor having a pair of wheels at one end thereof, of an implement adapted to be attached to and detached from said tractor comprising a frame arranged to encompass the tractor wheels when the implement is attached to the tractor, a plurality of implement units mounted on said frame, and arranged whereby said tractor wheels can be driven over one end of said frame in the operation of attaching or detaching the implement, an operating member for said units extending transversely of said frame adjacent to the latter end thereof, and ramps secured to said frame and extending in protecting relation o' er said operating member to permit the wheels of the tractor to be driven over the same.

'7. The combination with a tractor having iront and rear Wheels, of an implement adapted to be attached to and detached from said tractor, comprising frame means having a frame bar arranged to extend transversely of the tractor between said front and rear wheels when the implement is attached to the tractor, an operating unit supported by said frame means, an actuating member for said unit carried by said transverse frame bar, and means carried by said transverse. frame bar adjacent said actuating member and providing for the movement of the tractor wheels over said transverse frame bar and said actuating member during the operation of attaching or detaching said implement without injury to said frame bar or said member.

8. The combination with a tractor having supporting wheel means and a rear transverse bar, of an implement attachment having a frame comprising a front transverse frame bar adapted to be detachably connected with the tractor forward of said wheel means, a rear transverse frame bar having an intermediate portion adapted to be detachably connected with said iirst rear transverse bar carried by the tractor, said rear frame bar having downwardly bent ends at each side of the tractor, and longitudinal side frame bars secured to said downwardly bent ends and to the ends of said front transverse frame bar and extending alongside said tractor wheel means, and means carried by said front transverse frame bar providing for the movement of said tractor wheel means over the front transverse frame bar during the operations of attaching said implement to and detaching it from the tractor.

9. The combination with a tractor having front and rear wheels, of an implement adapted to be attached to and detached from said tractor, comprising frame means having a cross bar adapted to be disposed between said front and rear wheels when the implement is attached to the tractor and adapted to rest on the -ground when the implement is detached from the tractor, and

means whereby the wheels at one end of said tractor can be driven across said cross bar in the attaching or detaching of the implement.

10. The combination with a tractor having front and rear wheels, of an implement adapted to be attached to and detached from said tractor, comprising frame means having a frame bar arranged to extend transversely of the tractor between said front and rear wheels when the imp-lement is attached to the tractor, and ramp means associated with said transverse frame bar and arranged whereby the wheels at one end of said tractor can be driven across said ramp means in the attaching or detaching of the implement.

11. The combination with a tractor having front and rear wheels, of an implement adapted to be attached to and detached from said tractor, comprising frame means having side members adapted to be disposed outside of the path of the wheels of the tractor, and a cross bar connected with the forward ends of said side members and adapted to be disposed between said front and rear wheels and across and in close proximity to said rear wheels when the implement is attached to the tractor, said side members being connected with the cross bar at points outside of the path of the wheels of the tractor, and means detachably securing said frame means to the tractor, the portions of said cross bar extending across the tread lines of said wheels'being disposed at substantially right angles with respect thereto to facilitate the movement of the wheels over the cross bar when the forward ends of the side members are on the ground in attaching and detaching the implement.

CHARLES H. WHITE. 

